Saturation, Relaxation, and Dissociation of Excited Triplet Excitons in Conjugated Polymers | Zendy

Yang Xudong | Zendy; Lee ChangLyoul | Zendy; Westenhoff Sebastian | Zendy; Zhang Xinping | Zendy; Greenham Neil C. | Zendy

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Saturation, Relaxation, and Dissociation of Excited Triplet Excitons in Conjugated Polymers

Author(s) -

Yang Xudong,

Lee ChangLyoul,

Westenhoff Sebastian,

Zhang Xinping,

Greenham Neil C.

Publication year - 2009

Publication title -

advanced materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 10.707

H-Index - 527

eISSN - 1521-4095

pISSN - 0935-9648

DOI - 10.1002/adma.200802597

Subject(s) - excited state , materials science , exciton , femtosecond , saturation (graph theory) , polymer , conjugated system , dissociation (chemistry) , excitation , spectroscopy , ultrafast laser spectroscopy , relaxation (psychology) , molecular physics , photochemistry , atomic physics , chemical physics , chemistry , laser , optics , condensed matter physics , physics , mathematics , combinatorics , composite material , psychology , social psychology , quantum mechanics

Femtosecond pump‐probe spectroscopy is used to measure the excited state absorption dynamics in triplet excitons generated by continuous wave excitation of a conjugated polymer. Saturation of the T 1 – T n transition is observed, allowing a cross‐section of 2.0 × 10 −16 cm 2 to be established. Relaxation to T 1 occurs with a 300 fs timescale, but 20% of T n states dissociate into charges.

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